Question 1

Which function should be used to create a new thread in Rust?

Accepted Answer

The thread::spawn function from the std::thread module creates a new execution thread. It takes a closure as parameter and returns a JoinHandle that allows waiting for the thread to finish using the join() method. This function is the main entry point for thread-based concurrent programming in Rust.

Question 2

What does the join() method return when called on a JoinHandle?

Accepted Answer

The join() method returns a Result<T, E> where T is the return type of the thread's closure. If the thread completes normally, you get Ok(value). If the thread panicked, you get Err containing the panic information. This allows safely retrieving thread results or handling its errors.

Question 3

Why use the move keyword with a closure passed to thread::spawn?

Accepted Answer

The move keyword forces the closure to take ownership of captured variables instead of borrowing them. This is essential with thread::spawn because the new thread may outlive the scope where variables are defined. Without move, the compiler refuses because it cannot guarantee that references will be valid for the thread's entire lifetime.

Concurrency Basics

Which function should be used to create a new thread in Rust?

Câu trả lời

What does the join() method return when called on a JoinHandle?

Câu trả lời

Why use the move keyword with a closure passed to thread::spawn?

Câu trả lời

What is the role of the Send trait in Rust?

What is the role of the Sync trait in Rust?

Các chủ đề phỏng vấn Rust khác

Rust Basics

Ownership & Borrowing

Structs & Enums

Error Handling

Collections

Modules & Packages

Traits

Generics

Lifetimes

Iterators & Closures

Smart Pointers

async/await

Testing

Cargo & Ecosystem

Pattern Matching

Macros

Serde & Serialization

Unsafe Rust

Advanced Traits

Advanced Lifetimes

Type System

Tokio & Async I/O

Performance Optimization

Memory Management

Web Frameworks

Database Integration

Rust Design Patterns

Nắm vững Rust cho lần phỏng vấn tiếp theo